Molekula
Fast Green FCF (C.I. 42053)
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Fast Green FCF (C.I. 42053) is a triarylmethane dye widely used in biological staining, particularly as a protein stain for cytoplasm, collagen in Masson's trichrome and histones (alkaline Fast Green) in microscopy, and as a counterstain in protein gel electrophoresis. It appears green in solution and, as an anionic acid dye, binds to basic (cationic) cellular components such as protein amino groups and histones. Beyond the laboratory, it is also used as a color additive in foods, drugs and cosmetics, where it is known as FD&C Green No. 3. This chemical has a CAS number of 2353-45-9, a molecular formula of C37H34N2Na2O10S3, and a molecular weight of 808.85 g/mol. It is stored at ambient conditions, carries a signal word of "Warning," and is classified as hazardous under GHS regulations. Molekula supplies Fast Green FCF from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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10 g — £45.00 per pack ex VAT · £54.00 inc. VAT
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25 g — £93.30 per pack ex VAT · £111.96 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Red to brown powder |
| Identification | Conforms to reference |
| Assay | ≥85.0% |
| Water insoluble matter | ≤0.2% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Dark green powder or granules with a metallic luster |
| Melting Point | 290 °C (decomposes) |
| log P (octanol/water) | -3.22 |
Source: PubChem CID 16887 (HSDB)
Identification
| Property | Value |
|---|---|
| SKU | 24445751 |
| CAS Number | 2353-45-9 |
| IUPAC Name | disodium;2-[[4-[ethyl-[(3-sulfonatophenyl)methyl]amino]phenyl]-[4-[ethyl-[(3-sulfonatophenyl)methyl]azaniumylidene]cyclohexa-2,5-dien-1-ylidene]methyl]-5-hydroxybenzenesulfonate |
| EC Number | 219-091-5 |
| Molecular Formula | C37H34N2Na2O10S3 |
| Molecular Weight | 808.85 |
| Exact Mass | 808.1171 |
| SMILES | CCN(CC1=CC(=CC=C1)S(=O)(=O)[O-])C2=CC=C(C=C2)C(=C3C=CC(=[N+](CC)CC4=CC(=CC=C4)S(=O)(=O)[O-])C=C3)C5=C(C=C(C=C5)O)S(=O)(=O)[O-].[Na+].[Na+] |
| InChIKey | RZSYLLSAWYUBPE-UHFFFAOYSA-L |
| InChI | InChI=1S/C37H36N2O10S3.2Na/c1-3-38(24-26-7-5-9-33(21-26)50(41,42)43)30-15-11-28(12-16-30)37(35-20-19-32(40)23-36(35)52(47,48)49)29-13-17-31(18-14-29)39(4-2)25-27-8-6-10-34(22-27)51(44,45)46;;/h5-23H,3-4,24-25H2,1-2H3,(H3,41,42,43,44,45,46,47,48,49);;/q;2*+1/p-2 |
| PubChem CID | 16887 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 32129000 |
| Tariff Code | 3212900000 |
Safety & GHS
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Health Hazard
GHS07
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Serious Health Hazard
GHS08
Hazard statements
- H313 May be harmful in contact with skin
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
- H341 Suspected of causing genetic defects
Precautionary statements
- P201 Obtain special instructions before use
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P302+352 IF ON SKIN: Wash with soap and water
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Russian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- Aizen Food Green No. 3
- C.I. 42053
- C.I. Food Green 3
- C.I. FOOD GREEN 3, DISODIUM SALT
- Fast Green FCF
- FD & C Green no. 3
- Food green 3
- Food Green No. 3
- Solid Green FCF
- Zelen Stala FCF
Frequently asked questions
What is Fast Green FCF (C.I. 42053) commonly used for?
Fast Green FCF is primarily used as a dye in biological staining, particularly in histology for staining collagen and cytoplasm in Masson's trichrome as a substitute for Light Green SF yellowish, and in various analytical applications requiring a green-colored indicator.
What is the chemical formula and molecular weight of Fast Green FCF?
The chemical formula is C₃₇H₃₄N₂Na₂O₁₀S₃, and the molecular weight is 808.85 g/mol.
How should Fast Green FCF be stored?
Store at ambient temperature in a cool, dry place, away from direct sunlight and incompatible substances.
What grade or purity is available for Fast Green FCF?
Molekula supplies analytical grade Fast Green FCF, suitable for laboratory and research applications requiring high purity.
Can Molekula supply Fast Green FCF in bulk quantities?
Yes, we offer bulk quantities of Fast Green FCF to accommodate large-scale research or industrial needs—please contact us for pricing and availability.
What documentation comes with an order of Fast Green FCF?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and a product specification sheet detailing purity, CAS number, and storage instructions.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.